ADT has a very bad customer service

I called ADT on Monday and spoke about how my alarm needs service because it was faulty, and I told them by Thursday there will be no 1 at the house and the area is known for high rate of house ******ies. They told me a manager will call me to urgently come fix the problem and since then no one from ADT has contacted me, and now I'm told my house has been broken into, and no one from ADT seems to be aware of that. For 2 years I have been calling for my ADT sign to be replaced since it was ******, till now nothing has been done. I am a very unhappy customer and unpleased with this kind of service.